- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Highly ordered Au-decorated Ag nanorod arrays as an ultrasensitive and reusable substrate for surface enhanced Raman scattering
摘要： For surface-enhanced Raman spectroscopy (SERS) substrates, complexity of the fabrication process, sensitivity and stability are factors that need to be considered. We report a simple and novel method for preparing an effective substrate that greatly enhances SERS signals. The SERS substrate is fabricated by selectively electroless deposition of Ag nanoparticles in the highly ordered porous anodized aluminum oxide (AAO) template and then etching it to form Ag nanorod bundles structure, so that the Raman enhancement occurs in the gap between the nanorods and the top of the nanorod bundle, which is verified by finite element analysis. A peculiarity of this method is that this is the first time to synthesize Ag nanorod arrays structure by using it. The results indicated that this prepared substrate has special micro-nano structure and when rhodamine 6 G is selected as the detection reagent, the detection limit is as low as 10?16 M with excellent recyclability. This outstanding array structure has a promising practical application in SERS field.
关键词： Reproducibility,Electroless deposition,Micro-nano structure,SERS,Ag nanorod arrays
更新于2025-09-23 15:21:21
-
Review: Surface Texturing Methods for Solar Cell Efficiency Enhancement
摘要： Demand for renewable energy continually increases due to environmental pollution and resource depletion caused by the increased use of fossil fuels. Among the various renewable energies, the solar cell developed by numerous researchers has been widely used because of its advantages, including ease of use and low maintenance cost. However, problems, such as efficiency, waste treatment, and light pollution, also raise concerns. The largest drawback of solar cell has been the low energy conversion efficiency arising from optical loss. To improve solar cell efficiency, numerous studies have been conducted, and thus, various solutions were developed in recent decades. In this review, the principle and application of surface texturization methods utilizing micro/nano scale structure on the surfaces of solar cells are elaborated in detail. These texturized surfaces with unique optical properties can be implemented as anti-reflective or light-trapping interfaces to reduce optical loss and thus enhance the efficiency of solar cells. Optical properties of texturized surfaces and applied examples are introduced in this review.
关键词： Optical path length enhancement,Nano structure,Micro structure,Solar cell,Anti-reflection
更新于2025-09-19 17:13:59
-
Hybrid energy harvester with bi-functional nano-wrinkled anti-reflective PDMS film for enhancing energies conversion from sunlight and raindrops
摘要： The hybrid energy harvester composed of a solar cell and a water-drop triboelectric nanogenerator (WD-TENG) has been reported to harvest energy from sunlight or raindrops depends on the changing natural environment. However, the reported integrated WD-TENGs always reduce the light absorption of solar cells, resulting in a decline of solar cell efficiency. Here, a bi-functional nano-wrinkled polydimethylsiloxane (nw-PDMS) film is introduced to fabricate the hybrid energy harvester, serving as both the anti-reflective layer of the solar cell and the triboelectric layer of the WD-TENG, and simultaneously enhancing the energy harvesting efficiency from sunlight and raindrop. With significantly enhanced transmittance due to the anti-reflective coating, the power conversion efficiency of the solar cell has improved from 12.55% to 13.57%. In addition, due to the high aspect ratio, surface fluorination and strong hydrophobicity of the nw-PDMS film, both open circuit voltage (VOC-T) and short-circuit current (ISC-T) of the WD-TENG have huge enhancement by 385.5% and 299.1%, respectively. In this work, the introducing of bi-functional nw-PDMS film provides a simple and convenient strategy for designing hybrid energy harvester with enhanced output performances, which is a general route for Si-based solar cell and other kinds of solar cells.
关键词： solar cell,nano structure,raindrop energy,triboelectric nanogenerator,anti-reflective coating
更新于2025-09-19 17:13:59
-
Preparation of miRNA137 biomimetic coated coronary stent by dual-injection four-beam laser interference
摘要： In recent years, miRNA137 has shown great potential in inhibiting postoperative restenosis. In this paper, a mutual injection dual-output solid-state laser was used as the light source to construct a four-beam interferometric processing system to perform micro-nano processing on the surface of the metal coronary stent, which provides a good substrate for loading the miRNA137 onto the surface of the stent. The laser used in the experiment has a working wavelength of 1064 nm, and the energy of the two lasers is 183 mJ and 181 mJ, the energy of the four laser beams obtained by beam splitters is 97mJ, 83mJ, 95mJ and 82mJ respectively, the angle between the beams is 90 degrees and the exposure time is 60 s. When the incident angle is 14.52 degrees, a bionic micro/nano structure with a period of 3.077 μm is obtained. According to the preliminary comparative test, the structed stent with a period of 3.077μm has stronger adhesion property and longer drug release period to miRNA137 compared with the period of 1.063μm and 5.082μm.
关键词： Stent,Mutual injection laser,Micro/Nano structure,Bionic coating,MiRNA137
更新于2025-09-19 17:13:59
-
Fabrication of a fiber probe using a CO2 laser for microstructure measurement: High functionality and durability test
摘要： In recent years, the importance of measuring microstructures of mechanical microparts, micro holes, etc. has increased due to advances in microfabrication technology. Specifically, several microstructure measurement methods have been proposed with the objective of improving the functionality of devices. Therefore, we aim to develop a highly accurate measurement system with a low measurement force using a micro optical fiber probe. In this research, we conducted performance test of water repellent coating on a stylus tip to prevent adhesion to the measured surface by surface forces, in addition to durability tests.
关键词： micro hole,optical fiber,measurement,fiber probe,micro and nano structure,micro CMM
更新于2025-09-12 10:27:22
-
Suppression of viewing angle dependence of TEOLED devices with internal nano-wrinkle structure
摘要： In order to suppress the viewing angle dependence of top emission organic emitting diodes (TEOLEDs) with strong microcavity effect, we introduced randomly distributed nano-wrinkle structure beneath highly reflective anode. By applying such nano-wrinkle pattern, viewing angle dependence and color shift could be improved compared with that without nano-structure [e.g. Δ(u’, v’): 0.077 → 0.025]. However, current efficiency reduced more than half. To compensate this problem, we additionally introduced index matching epoxy filler between encapsulation glass and TEOLED device. By this approach, current efficiency drop of device with nano-wrinkle structure could be improved. For example, the efficiency dropped by 7.7% when we filled the epoxy filler between capping layer and glass lid while, it decreased by 30.8% if we don’t use epoxy filler. We found that index matching helps to extract more light confined inside TEOLED, so device performance degradation could be minimized. In addition, when we attached a circular polarizer film to these devices, depolarization was observed in most cases, but we were able to achieve a perfect black state from the devices with nano-wrinkle structure underneath reflective anode.
关键词： Black tint,Viewing angle dependence,Index matching,Nano structure,TEOLED,Color shift
更新于2025-09-11 14:15:04
-
[IEEE 2019 IEEE Photonics Conference (IPC) - San Antonio, TX, USA (2019.9.29-2019.10.3)] 2019 IEEE Photonics Conference (IPC) - Indistinguishable On-Chip Single-Photon Sources
摘要： Progress on integrating InGaAs quantum-dot single-photon sources within GaAs semiconductor photonic chips is reviewed. With resonant excitation, a radiative lifetime as short as 23 ps has been observed for a dot in a photonic-crystal nano-cavity, leading to single-photon emission with both high purity and indistinguishability.
关键词： Purcell effect,photonic nano-structure,single-photon source,integrated quantum photonics,quantum dot
更新于2025-09-11 14:15:04